Vehicle Wiring Details for a
1986 Pontiac Fiero
Item Wire Color Polarity Wire Location
12V red Positive (+) ignition harness
Starter yellow Positive (+) ignition harness
Starter 2 none
Ignition pink Positive (+) ignition harness
2nd Ignition none
3rd Ignition none
Accessory orange Positive (+) ignition harness
Accessory 2 none
Tachometer purple/white ECM [1]
Power Door (Lock)
Wiring Diagram for
[Positive (+)] Door Lock
lt. blue Positive (+) either kick panel
Power Door (Unlock)
Wiring Diagram for
[Positive (+)] Door Unlock
black Positive (+) either kick panel
Door Trigger white or dk. grn. [2 Negative (-) pinswitch, cluster
Dome Supervision
Wiring Diagram for
[] Dome
Headlights yellow and white [3] headlight switch
Parklight Positive brown Positive (+) headlight switch
Parklight Negative none
Left Front Window
dk. blue - brown power window switch
Right Front Window
dk. blu/wht - tan power window switch
Left Rear Window
Right Rear Window
Trunk/Hatch Pin dk. green [2] Negative (-) instrument cluster
Hood Pin dk. green [2] Negative (-) instrument cluster
Trunk/Hatch Release
Wiring Diagram for
[] Trunk/Hatch
Factory Alarm
Factory Alarm
Horn black Negative (-) steering column
Brake white Positive (+) steering column
Door Motor
Door Motor
Disarm none
Disarm No Unlock none
Additional Info:
[1] The ECM is located on the back wall between the seats. [2] The white at either pinswitch will catch the doors and the dk. green at the instrument cluster will catch the doors, hood, and trunk. [3] Energize the yellow wire with 12V+ and interrupt the white wire to raise and activate.

ATTENTION: This wiring information is being provided free of charge and on an "as is" basis, without any representation or warranty. It is your responsibility to verify any circuit before interfacing with it by using a digital multimeter. GNU Industries, Inc. assumes no responsibility with regards to the accuracy or currency of this information. Proper installation in every case is and remains the responsibility of the installer. GNU assumes no responsibility resulting from an improper installation, even in reliance upon this information.

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